Leah Remini quit the controversial cult earlier this year after being raised a Scientologist and blasted the belief system invented by Science Fiction writer L. Ron Hubbard in the 1950s.

"She's a bigot," Alley said, asking Stern: "If someone was out there [attacking your religion], would they be your friend? They wouldn't be mine ... It's not selective, I just won't have people in my life that are [bigots]."

Leah Remini responded with kindness and answered with class smiling and saying, "I wish the best for people," when pushed for a rebuttal during a midnight street interview by a TMZ reporter.

Watch the video below.

More on Kirstie's interview - Alley also said she refuses to have Botox.

The former 'Cheers' star claims she hasn't had any surgery, and would never have face fillers because she doesn't know what the long-term effects could be.

She told Stern: "I don't do Botox because don't you just think in the next 15 years, there's gonna be a discovery that injecting botulism could have an effect?

"You don't know what it is. And you don't know what it's gonna do to you, or where it's gonna migrate."

While she's never been under the knife herself, she admits to being tempted, adding: "I don't have any surgery. I don't think you should be filling your face. I've debated ... For 30 years!"

Kirstie, 62, added she has been advised to have surgery many times, even from the very beginning of her career.

She said: "The first job I had, for 'Star Trek', the cinematographer said, 'You might want to do something about your eyes, because they're a little bulgy. They're a little baggy underneath.'

"And then over the years, I started looking at children. Children's eyes are always sort of baggy ... They have the bags under here.

"So I just started thinking. I'm gonna look at what youth looks like. And most of what youth looks like is happy! People are happy, and they have energy and they can move."